Improvement in lime-bm



P. JQGBRBAULT-GUIGHARD.'

N.0'..1'o6,054. Patented Aug. 2, 1870.

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Letters Patent No. 106,054, dated August 2, 187 0.

IMPROVEMENT YIN LIME-arms.

To all whomit may concern :r .i

Be it known that I, PIERRE J AoQUEs GERBAULT- GUICHARD, of St.Berth'evin-'le-Laval, in theEmpire of France, have inventeda new anduseful Improvei strnctedI in accordance with my invention Figure 2` is avertical section of the same, as in liV cated by the dotted lin'e :z: x,`in iig, 1;' Figure' is avertical section, taken on the linefoy; f

Figure-4 is a horizontalsection, taken'on the linee` chaud" l. J'-Figure', a similar section, on the line 'w w Similar 'letters ofreference yindicate corresponding `parts in the severahgnres.

Thisinvention consists` in a novel lformand constructionof a`continuouslime-kiln, whereby the op- 'eration ofjfeedingcan be carriedoniwith more ease andl acciuacy,`and a more' perfect combustion ofthefuel, and more uniform calcination of the lime are obtained than inlime-kilns as ordinarily constructed.

To enable others to construct lime-kilns in accorde` aneewithy myinvention, I will proceed to describe thev same vwith reference to thedrawing.

The kiln is huilt -in two parts, of which the upper,

" D, equal to about one-third'of the whole height, and forming aheatingchainber,`is set hack a certain disratoryO and receiver B.v iThese two partsare connected by a vault, E, which laboratory O, andprovided tance from thelowerlpart, which comprises the labo- `with irondoorsF.

' Openings, G, areformed in the 'lowerend of the heating-chamber D,opposite the doors F, through chamber-'D is' fed tothe .laboratory C.

Doors, H, are provided at the bottom ofthe receiver .which 'limestonethatis contained in the heatingi "better reach across the-fnrnace.

That portion'of'thekiln which comprises the receiver B and thelaboratory C. is widened somewhat toward the middle,leaving the upperand ,lower openings narrower, thus allo-wing'the fuel to settle down'easierand mixsomewhat with the limestone.

The receiverB is provided at its lower mouth with .Both theheating-chamber D and that portion of the kiln comprising thereceiver Band the laboratory .0 are made ofthe form of'a parallelogram in their adivision, a, which provides two outlets to said receiver.

vThe doors' H, arranged to said outlets, serve also to regulatetheadmission of air necessary for the. combustion of fuel, more or lessbeing admitted to produce faster or slower combustion, and so carry onitheoperation of caleinatiou faster or slower, as the demand requires.`

To prevent a too free passage of the air throng the limestone in thereceiver, the latter has its corners' rounded, allowing the pieces ofstone to fill out the space in the receiver closer.

The operation of this lime-kiln is as follows:

A proper quantity of fuel is deposited `on the limestone contained inthe receiver B, through the doors F, when the operator, by meansA of aproper tool, rakes the hot limestone contained in the heating chamber Donto said fuel, filling up the space of the i laboratory and ignitingsaid fuel. The doors F are then securely closed, to allow the processofcalcina-V tion to go on slowly.

When the operator jndgesthe process complete, a. quantity of lime, equalto the amount contained in the laboratory, is withdrawn from thereceiver 'through the openings-H, allowing the contents of thelaboratory to lbe discharged intc'rthe` receiver, and leaving thelaboratory ready fora new charge.

Lime-kilnsv thus constructed not only retain all the desirableproperties of the ordinarilyfconstructed kilns, but they possessadditional advantages.

The principalproperties common to all are- First, vthe utilization ofthe heat contained vin `the calcined limestone for heating the'air usedfor oombnstion.

` Second, .using the bulk of limestone contained in the receiver' as anatural grate for thefnel employed.

Third, the utilization of the h'ot gases emanatingA from the laboratory,for preheating the limestone con-- tained in the upper part of thefurnace.

rIhe additional advantages obtained by this constructionare- V First, 4amore-'perfect combustion of the fuel, by

using the same at'the most favorable time and place,- and preventing theformation of carbonic oxide, which burns uselessly on thesurface inlime-kilns of ordinary construction.

Second, enabling the admission of air to he regu.

i lated for the proper combustion of fuel, without raising'thetemperature in the furnace above 1,200 centi-y grades.

v'l?hird,preventing` the bad eli'ects of a too high tem,- peiature inone place of the furnace and a too low one in'another place. Y

Fourth, the construction of the furnace of the form of :tpa-milelograun, whereby the operator is en- The combination of' theheating-chamber D, vault :lbed to better reach across the furnace forthe por E, and door F with the laboratory C and doors H, pose ofrenewing vthe clam-ges. y when constructed and arranged substantially asshown Fifth, enabling the operator to watch the progress :md described,for the purposes set forth. ofcnlcination, and the most, womble time forrenew-V GERBAULT-GUIOHARD. ing the charges, lby menus of' the peepJiolesin the doors F of the vault E. W'itnesses:

'What is here claimed, :md desired to be secured by J. GESLOT1 aine',Letters Patent, is PIERRE FOUQUET.

